Refinement of SEO output for a website with CMS Bitrix

Good afternoon!
Looking for a backend/fullstack developer with experience setting up SEO to make edits to the display of meta tags on pages. Problem - data is not pulled from the necessary bitrix variables.

Please respond only to those who have already had experience in SEO setting up Bitrix and are well acquainted with variables.

On a budget of 4000-5000₽ for this task, 4000₽ was indicated as the minimum budget